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d

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D, d

  [dee]
Use d in a Sentence
–noun, plural D's or Ds, d's or ds.
1. the fourth letter of the English alphabet, a consonant.
2. any spoken sound represented by the letter D or d, as in dog, ladder, ladle, or pulled.
3. something having the shape of a D.
4. a written or printed representation of the letter D or d.
5. a device, as a printer's type, for reproducing the letter D or d.

d-

 
Symbol, Biochemistry. (of a molecule) having a configuration resembling the dextrorotatory isomer of glyceraldehyde: always printed as a small capital, roman character (distinguished from l- ).
Compare d-.

d-

 
Symbol, Chemistry, Biochemistry.
dextrorotatory; dextro- (distinguished from l- ).
Compare D-.

d'

1 
–preposition
1. de (used in French names as an elided form of de): Charles Louis d'Albert.
2. di (used in Italian names as an elided form of di): Gabriele d'Annunzio.

d'

2 
Pronunciation Spelling. contraction of do or did before you: How d'you like your eggs cooked? D'you go to the movies last night?

'd

 
1. contraction of had: I was glad they'd gone.
2. contraction of did: Where'd they go?
3. contraction of should or would: He'd like to go. I'd like to remind you of your promise.
4. contraction of -ed: She OK'd the plan.

D

 
1. Electricity. debye.
2. deep.
3. depth.
4. Optics. diopter.
5. divorced.
6. Dutch.

D

 
Symbol.
1. the fourth in order or in a series.
2. (sometimes lowercase) (in some grading systems) a grade or mark, as in school or college, indicating the quality of a student's work as poor or barely passing.
3. (sometimes lowercase) a classification, rating, or the like, indicating poor quality.
4. Music.
a. the second tone in the scale of C major, or the fourth tone in the relative minor scale, A minor.
b. a string, key, or pipe tuned to this tone.
c. a written or printed note representing this tone.
d. (in the fixed system of solmization) the second tone of the scale of C major, called re.
e. the tonality having D as the tonic note.
5. (sometimes lowercase) the Roman numeral for 500. Compare Roman numerals.
6. Chemistry. deuterium.
7. Electricity.
a. electric displacement.
b. a battery size for 1.5 volt dry cells: diameter, 1.3 in. (3.3 cm); length, 2.4 in. (6 cm).
8. Biochemistry. aspartic acid.
9. a symbol for a shoe width size narrower than E and wider than C.
10. a proportional brassiere cup size larger than C.

D.

 
1. day.
2. December.
3. Democrat.
4. Democratic.
5. Physics. density.
6. Deus.
7. Deuteronomy.
8. Doctor.
9. dose.
10. Dutch.

d.

 
1. (in prescriptions) give. Origin:
< L dā
2. date.
3. daughter.
4. day.
5. deceased.
6. deep.
7. degree.
8. delete.
9. British. pence. Origin:
< L denāriī
10. British. penny. Origin:
< L denārius
11. Physics. density.
12. depth.
13. deputy.
14. dialect.
15. dialectal.
16. diameter.
17. died.
18. dime.
19. dividend.
20. dollar; dollars.
21. dose.
22. drachma.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To d
d 1 or D   (dē)   
n.   pl. d's or D's also ds or Ds

  1. The fourth letter of the modern English alphabet.

  2. Any of the speech sounds represented by the letter d.

  3. The fourth in a series.

  4. Something shaped like the letter D.

  5. D The lowest passing grade given to a student in a school or college.

  6. Music

    1. The second tone in the scale of C major or the fourth tone in the relative minor scale.

    2. A key or scale in which D is the tonic.

    3. A written or printed note representing this tone.

    4. A string, key, or pipe tuned to the pitch of this tone.

d 2  
abbr.  

  1. deuteron

  2. diameter

  3. differential

  4. down quark

D 1  

  1. The symbol for the isotope deuterium.

  2. also d The symbol for the Roman numeral 500.

D 2  
abbr.  

  1. dative

  2. day

  3. Democrat

  4. down

day   (dā)   
n.  

  1. The period of light between dawn and nightfall; the interval from sunrise to sunset.

    1. The 24-hour period during which the earth completes one rotation on its axis.

    2. The period during which a celestial body makes a similar rotation.

    3. A specific, characteristic period in one's lifetime: In Grandmother's day, skirts were long.

    4. A period of opportunity or prominence: Every defendant is entitled to a day in court. That child will have her day.

  3. Abbr. D One of the numbered 24-hour periods into which a week, month, or year is divided.

  4. The portion of a 24-hour period that is devoted to work, school, or business: an eight-hour day; a sale that lasted for three days.

  5. A 24-hour period or a portion of it that is reserved for a certain activity: a day of rest.

    1. A specific, characteristic period in one's lifetime: In Grandmother's day, skirts were long.

    2. A period of opportunity or prominence: Every defendant is entitled to a day in court. That child will have her day.

  7. A period of time in history; an era: We studied the tactics used in Napoleon's day. The day of computer science is well upon us.

  8. days Period of life or activity: The sick cat's days will soon be over.

adj.  

  1. Of or relating to the day.

  2. Working during the day: the day nurse.

  3. Occurring before nightfall: a day hike.


[Middle English dai, day, from Old English dæg; see agh- in Indo-European roots.]
deu·ter·on   (dōō'tə-rŏn', dyōō'-)   
n.   Abbr. d
The nucleus of a deuterium atom, consisting of a proton and a neutron, regarded as a subatomic particle with unit positive charge.

[deuter(ium) + -on1.]
di·am·e·ter   (dī-ām'ĭ-tər)   
n.  

  1. Abbr. d or diam. Mathematics

    1. A straight line segment passing through the center of a figure, especially of a circle or sphere, and terminating at the periphery.

    2. The length of such a segment.

  2. Thickness or width.

  3. A unit for measuring the magnifying power of a microscope lens or telescope, equal to the number of times an object's linear dimensions are apparently increased.


[Middle English diametre, from Old French, from Latin diametrus, from Greek diametros (grammē), diagonal (line) : dia-, dia- + metron, measure; see mē-2 in Indo-European roots.]
di·am'e·tral (-trəl) adj.
down quark  
n.   Abbr. d
A quark with a charge of - 1/3 , a mass about 20 times that of the electron, and a downward spin. It is a component of protons and neutrons. See Table at subatomic particle.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Financial Dictionary

D

A Nasdaq stock symbol specifying that the stock is a new issue.

Investopedia Commentary

Nasdaq-listed securities have four or five characters. If a fifth letter appears, it identifies the issue as other than a single issue of common stock or capital stock

See also: Nasdaq, Stock Symbol

Also spelled: D

Investopedia.com. Copyright © 1999-2005 - All rights reserved. Owned and Operated by Investopedia Inc.
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Financial Dictionary

d

Used in the daily or weekly low column of stock transaction tables in newspapers to indicate that the price of a security reached a new 52-week low: d16.

Wall Street Words: An A to Z Guide to Investment Terms by David L. Scott.
Copyright © 2003. Published by Houghton Mifflin.
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Legal Dictionary

Main Entry: D
Function: abbreviation
1district
2defendant
Merriam-Webster's Dictionary of Law, © 1996 Merriam-Webster, Inc.
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Medical Dictionary

Main Entry: d
Function: abbreviation
1 dalton
2date
3 daughter
4 day
5 dead
6 deceased
7 deciduous
8 degree
9 density
10 developed
11 deviation
12 dexter
13 diameter
14 died
15 diopter
16disease
17 divorced
18 dorsal
19 dose
20 duration

Main Entry: D
Function: symbol
deuterium
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
Cite This Source
Medical Dictionary

D 1

The symbol for the isotope deuterium.

D 2
abbr.

  1. dexter

  2. diffusing capacity

  3. dead space

D. abbr.

  1. diopter

  2. dose

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Computing Dictionary

D
1. "The Data Language." MS-DOS 4GL.
2. A Haskell-like language, with type classes.
E-mail: .

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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Abbreviations & Acronyms
d

  1. deuteron

  2. diameter

  3. differential

  4. down quark

D

  1. dative

  2. day

  3. Democrat

  4. determiner

  5. deuterium

  6. [suggestive] dialogue (television rating)

  7. diction

  8. divorced

  9. down

  10. Dutch

  11. 500

  12. Germany (international vehicle ID)

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
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